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The MCM69C433 is a flexible content–addressable memory (CAM) that can contain 16K entries of 64 bits each. The widths of the match field and the output field are programmable, and the match time is designed to be 240 ns. As a result, the MCM69C433 is well suited for datacom applications such as Virtual Path Identifier/Virtual Circuit Identifier (VPI/VCI) translation in ATM switches up to OC12 (622 Mbps) data rates and Media Access Control (MAC) address lookup in Ethernet/Fast Ethernet bridges. The match duty cycle of the MCM69C433 is user–defined, with a trade–off between the time between the match request rate and the rate of new entries added to the CAM per second.

? 16K Entries

? 240 ns Match Time

? Mask Register to “Don’t Care” Selected Bits

? Depth Expansion by Cascading Multiple Devices

? 66 MHz Maximum Clock Rate

? Programmable Match and Output Field Widths

? Concurrent Matching of Virtual Path Circuits and Virtual Connection Circuits in ATM Mode

? Separate Ports for Control and Match Operations

? 450 ns Insertion Time if 1 of 14 Entry Queue Locations is Empty

? 120 ms Initialization Time After Fast Insertion (at Power–Up Only)

? Single 3.3 V ±5 Supply

? IEEE Standard 1149.1 Test Port (JTAG)

? 100–Pin TQFP Package